Fig. 4

Movement percentages (MP) for the different coupling types in both the vertical and horizontal conditions. a shows the results averaged across all participants, while b and c show the data for individual participants. The columns represent the mean MP values for couplings for the \(\tau_{d}\) and \(\tau_{g}\) and \(\tau_{\alpha }\) and \(\tau_{g}\) gaps. The error bars represent the standard error and asterisks show the significant differences. Note how there is a significant difference between the horizontal and vertical conditions for both types of coupling